Preparation of oxetanes by silicon-directed 4-exo trig electrophilic cyclisations of homoallylic alcohols
摘要:
The reaction of homoallylic alcohols with bis(sym-collidine)bromine(I) hexafluoroantimonate led in good yields to the formation of oxetanes if a silyl group was fixed on the carbon-carbon double bond in terminal position. This reaction was stereospecific when no supplementary substituent was present on the double bond. (C) 2001 Elsevier Science Ltd. All rights reserved.
Preparation of oxetanes by silicon-directed 4-exo trig electrophilic cyclisations of homoallylic alcohols
摘要:
The reaction of homoallylic alcohols with bis(sym-collidine)bromine(I) hexafluoroantimonate led in good yields to the formation of oxetanes if a silyl group was fixed on the carbon-carbon double bond in terminal position. This reaction was stereospecific when no supplementary substituent was present on the double bond. (C) 2001 Elsevier Science Ltd. All rights reserved.